Massac County RainfallUnited StatesILMassac County20%Metropolis 20% Chance 20%Brookport 20% Chance 25%Mermet Lake 25% Chance Big BayBoazBrookportCretaceous Hills Nature PreserveFort Massac State ParkHillermanJoppaMassac Forest Nature PreserveMermetMermet LakeMetropolisMetropolis Municipal AirportNew ColumbiaRound KnobSamothShady GroveUnionville